No audio output when configured

I've tried to set up audio output through HDMI using the troubleshooting page on the Wiki, however when I try to play the audio it claims to be playing it, though I hear no audio from either the 3.5mm jack or HDMI. I've tried forcing it to HDMI mode, but still no audio.

Can anyone offer me any advice? I'm running Debian squeeze and all my packages are updated.

Yes, I have tried Wheezy. I had hoped that it would work, but no such luck.

I have discovered that analogue audio does work in wheezy, but is hideously noisy, with loud "squawk" preceding everything played.

The music player installed as default in Debian doesn't work at all. Alsa Player does play, but if you try to drag its window around the sound breaks up and doesn't recover unless you close it and restart it.

The biggest disappointment is that sound does not work in Scratch. The kids were looking forward to it (and I was looking forward to them not squabbling over the laptop)

I guess its all down to the "alpha" status of the sound drivers....... Just have to be patient.

Yes, I have tried Wheezy. I had hoped that it would work, but no such luck.

I have discovered that analogue audio does work in wheezy, but is hideously noisy, with loud "squawk" preceding everything played.

The music player installed as default in Debian doesn't work at all. Alsa Player does play, but if you try to drag its window around the sound breaks up and doesn't recover unless you close it and restart it.

The biggest disappointment is that sound does not work in Scratch. The kids were looking forward to it (and I was looking forward to them not squabbling over the laptop)

I guess its all down to the "alpha" status of the sound drivers....... Just have to be patient.